Reapply remove setTimeout, take 3.

samples/swarm/App.dart

Index: samples/swarm/App.dart
diff --git a/samples/swarm/App.dart b/samples/swarm/App.dart
index 2837320a1de5c78028cf056780a3800701ee550e..376a17d3dbd2069a1dc76fe57d43f2015b93c9e3 100644
--- a/samples/swarm/App.dart
+++ b/samples/swarm/App.dart
@@ -27,9 +27,9 @@ class App {
     if (document.readyState == "interactive" ||
         document.readyState == "complete" ||
         document.readyState == "loaded") {
-      // We use setTimeout to insure that onLoad is always called in an async
+      // We use a timer to insure that onLoad is always called in an async
       // manner even if the document is already loaded.
-      window.setTimeout(() => onLoad(), 0);
+      Timer.run(onLoad);
     } else {
       window.onContentLoaded.listen(
         // TODO(sigmund):  Consider eliminating the call to "wrap", for